John l



JOHN-Lenses, or MCALISTERWLLE, PENNSYLVANIA.

Letters Page@ No. 79,804, @zml Juzg 14, 1868.

IMPROVED SCROLL POR WATER-WHEELS.

` @te tlgemhe referat in in time tzter atmt 31th mating @nl uf tigesamp,

TO ALL WHOM IT MAY CONGERN Be it known that I, JOHN L. BEERS,of-McAlisterville, in the countyl of .Iuniatzn and in the State of Penn-Sylvania., have invented certain new and useful Improvements in Scrollsfor Water-Wheels; and 'do hereby` declare that the following is a. full,clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon; li y In the annexed drawings, .n akingv part of'this specification, Arepresents thethroat of a. scroll for con; ducting water to a.horizontal water-wheel. This throat has placeclin it a castiron tongue,B, of about the same curvature -as the A,back part of the scroll. Thistongue is made thick enough to stand the pressure of water upon it, andas wide as the throat is fromfside-toside, so that by moving its cuterend the throat may be diminished or increased in size. I

' The outer end ofthe tongue is hinged or hooked to a bar, C. Drepresents the gate.

Both the gate and the bar slide upon suitable ways made for them. Thebar is provided with a pin, a,

which plays through and in a slot made inthe gate D. This-gate and barare for the purpose of opening and `closing 'the month ofthe scroll,controlling and regulating the supply of water to the wh'eel, which isnot here represented.

By means of the tongue B the throatis made larger or smaller, toaccommodate the amount of water required. In' shutting off the watezgthegate Dis rst closed, which relieves the tongue B of pressure, so that.

the innerbar C mayv lie-closed.

`Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is- T'he arrangement of the gateDand' bar C with the adjustable tongue B and the throat A, as and for thepurpose speeerl. I `In testimony that I claim the foregoing, I havehereunto set my-hand, this 10th 'day of June, 1867.

JGHN L. BEERS.

Witnesses:

JOHN T. CRIS'WELL, WILLIAM DUNN.

